[llvm] [X86] Consistently use f128 libcalls (PR #142386)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

> Which part do you have in mind? That the f128 libcalls also get used on x86-32?

Yes - does this match gcc behaviour btw?

https://github.com/llvm/llvm-project/pull/142386